utils/TableGen/SubtargetEmitter.h

   1 //===- SubtargetEmitter.h - Generate subtarget enumerations -----*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by James M. Laskey and is distributed under
   6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This tablegen backend emits subtarget enumerations.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef SUBTARGET_EMITTER_H
  15 #define SUBTARGET_EMITTER_H
  16
  17 #include "TableGenBackend.h"
  18 #include "llvm/Target/TargetInstrItineraries.h"
  19 #include <vector>
  20 #include <map>
  21 #include <string>
  22
  23
  24 namespace llvm {
  25
  26 class SubtargetEmitter : public TableGenBackend {
  27
  28   RecordKeeper &Records;
  29   std::string Target;
  30
  31   void Enumeration(std::ostream &OS, const char *ClassName, bool isBits);
  32   void FeatureKeyValues(std::ostream &OS);
  33   void CPUKeyValues(std::ostream &OS);
  34   unsigned CollectAllItinClasses(std::map<std::string, unsigned>
  35                                                                &ItinClassesMap);
  36   void FormItineraryString(Record *ItinData, std::string &ItinString,
  37                            unsigned &NStages);
  38   void EmitStageData(std::ostream &OS, unsigned NItinClasses,
  39                      std::map<std::string, unsigned> &ItinClassesMap,
  40                      std::vector<std::vector<InstrItinerary> > &ProcList);
  41   void EmitProcessorData(std::ostream &OS,
  42                        std::vector<std::vector<InstrItinerary> > &ProcList);
  43   void EmitProcessorLookup(std::ostream &OS);
  44   void EmitData(std::ostream &OS);
  45   void ParseFeaturesFunction(std::ostream &OS);
  46
  47 public:
  48   SubtargetEmitter(RecordKeeper &R) : Records(R) {}
  49
  50   // run - Output the subtarget enumerations, returning true on failure.
  51   void run(std::ostream &o);
  52
  53 };
  54
  55
  56 } // End llvm namespace
  57
  58 #endif
  59
  60
  61